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Serial Ports ServerUser Manual

Version 1.2

User manual - Serial Ports Server

ContentsI.Introduction......................................................................5

I.1 - ACS-31- 310 - 4100 serial ports server's serie.................................5I.2 - Furnished features.............................................................................5I.3 - Symbolics...........................................................................................5

II.ACS overview..................................................................7II.1 - ACS-32...............................................................................................7II.2 - ACS-320.............................................................................................7II.3 - ACS-4200...........................................................................................7

III.Installation......................................................................8III.1 - Indicating LEDS of ACS-31..............................................................8III.2 - Indicating LEDS of ACS-310............................................................8III.3 - Indicating LEDS of ACS-4100..........................................................9III.4 - Ports and interfaces of ACS-31.......................................................9III.5 - Ports and interfaces of ACS-310.....................................................9III.6 - Ports and interfaces of ACS-4100 ................................................10III.7 - Cautions..........................................................................................10

III.7.1 - Cleaning ACS...............................................................................................10III.7.2 - Note..............................................................................................................10

III.7.2.1 - About ACS-31........................................................................................10III.7.2.2 - General note..........................................................................................11

IV.Configuration...............................................................12IV.1 - Introduction....................................................................................12IV.2 - Entering IP address.......................................................................12

IV.2.1 - Entering IP address from ACS administrator...........................................12IV.2.2 - Entering IP address from a terminal.........................................................12

IV.3 - HTTP Configuration (Netscape, Internet Explorer).....................13IV.4 - Network interface..........................................................................14

IV.4.1 - Identification................................................................................................14IV.4.2 - Route checking with PING command.......................................................15IV.4.3 - Routing table...............................................................................................15

IV.5 - Asynchronous interfaces..............................................................17IV.5.1 - Software settings........................................................................................17IV.5.2 - Asynchronous port mode..........................................................................17IV.5.3 - Type of control............................................................................................18IV.5.4 - Flow control.................................................................................................18IV.5.5 - Automatic disconnection of a Modem......................................................19IV.5.6 - Association of a modem form to a port....................................................19IV.5.7 - AutoUser mode...........................................................................................20

IV.6 - Saving and restoring ACS configuration.....................................20IV.6.1 - Saving in FLASH memory..........................................................................20IV.6.2 - Saving a configuration copy......................................................................20

IV.7 - Audit...............................................................................................21

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IV.7.1 - Audit on a remote machine........................................................................21IV.7.2 - Audit on your console................................................................................22IV.7.3 - Audit in a file...............................................................................................22IV.7.4 - List of created audits..................................................................................23IV.7.5 - Delete audit..................................................................................................23IV.7.6 - Start/stop audit............................................................................................23

V.Rawtty and RemoteCOM..............................................24V.1 - Introduction.....................................................................................24V.2 - RemoteCOM....................................................................................24

V.2.1 - RemoteCOM under Windows 95/98............................................................24V.2.1.1 - Setting up the ACS-31- 310 - 4100........................................................24V.2.1.2 - Installation of RemoteCOM driver...........................................................25

V.2.2 - RemoteCOM under Windows NT system...................................................27V.2.2.1 - Setting up the ACS-31- 310 - 4100........................................................27V.2.2.2 - Installation of RemoteCOM driver...........................................................28V.2.2.3 - Displaying RemoteCOM service status..................................................30

V.3 - Rawtty..............................................................................................31V.3.1 - Server configuration....................................................................................31V.3.2 - Setting up the ACS......................................................................................32V.3.3 - rawtty, rawclose...........................................................................................32

VI.Mux mode.....................................................................34VI.1 - Introduction....................................................................................34VI.2 - TCP Mux.........................................................................................34VI.3 - UDP Mux.........................................................................................34VI.4 - Example n°1: Remote management of a PLC by a technician. . .34

VI.4.1 - Description..................................................................................................34VI.4.2 - Configuration of client's side ACS............................................................35VI.4.3 - Configuration of server's side ACS...........................................................36

VI.5 - Example n°2: Remote management of a PLC by more than onetechnician (solution 1)............................................................................36

VI.5.1 - Description..................................................................................................36VI.5.2 - Solution........................................................................................................37VI.5.3 - Configuration of client's side ACS............................................................38VI.5.4 - Configuration of server's side ACS...........................................................38


VI.6.1 - Description..................................................................................................39VI.6.2 - Solution........................................................................................................39VI.6.3 - Configuration of client's side ACS............................................................40VI.6.4 - Configuration of server side's ACS...........................................................41


VI.7.1 - Description..................................................................................................42VI.7.2 - Solution........................................................................................................42VI.7.3 - Configuration of client's side ACS............................................................43VI.7.4 - Configuration of server's side ACS...........................................................44

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VII.Advanced functions....................................................45VII.1 - DHCP.............................................................................................45

VII.1.1 - Definition....................................................................................................45VII.1.2 - DHCP client................................................................................................45VII.1.3 - DHCP relay.................................................................................................46

VIII.Technical specifications...........................................47IX.Cabling..........................................................................49

IX.1 - RJ45 connector..............................................................................49IX.2 - ACS (DTE) to DTE equipment.......................................................49IX.3 - ACS (DTE) to asynchronous terminal (DTE)................................50IX.4 - ACS (DTE) to DCE equipment - RS232C (Modem)......................50IX.5 - ACS (DTE) to DCE equipment - RS422A......................................51IX.6 - ACS (DTE) to DCE equipment - RS485.........................................52

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I.Introduction

I.1 - ACS-31- 310 - 4100 serial ports server's serie

A serial ports server provides real COM ports on Ethernet networks. You can usemodems, barcodes readers or any serial device on the Ethernet network.

Thanks to the Mux mode, you can also establish a communication between two serialdevices through an asynchronous link. You can, for example, use a terminal on your ACSto manage a PLC located on a remote ACS.

Serial ports server's family is composed by the following products :

- ACS-31 provides 2 asynchronous ports (RS232C) and one Ethernet port.- ACS-310 provides 4 or 8 asynchronous ports (RS232C or RS422/485A) and oneEthernet port.- ACS-4100 provides 4, 8, 12 or 16 asynchronous ports (RS232C or RS422/485A) andone Ethernet port.

I.2 - Furnished features

You will find the following features with any ACS :

- A document titled "Getting started with ACS server/router". - ACS CD-ROM contains RemoteCOM drivers, Rawtty drivers and a few usefull softs.Please read the readme.html file for more information.- A DTE DB25 cable and a DTE DB9 cable. These cables are PC COM port compatible- RS232C).- A power supply cable.- A 5V power supply (ACS-31 and ACS-310 only)

I.3 - Symbolics

In all pictures of this documentation, we will use the following symbols :

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WAN Link Printer

Ethernet Network Modem

Lan link Aquisition dedonnées

Work Portablecomputer

Serial port serverfunction / Raw Mode Gateway

Terminal serverfunction

Remote accessrouter function

Mux Mode function Server

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II.ACS overview

II.1 - ACS-32

ACS-31 provides 2 asynchronous ports. Thanks to the "raw" function of ACS, you canconnect printers or any other serial equipment (bar-code reader, data acquisition system,a.s.o...).Just run on your Unix server the "rawtty" application (or RemoteCom on Windows NT and95) to redirect the in and out data flow of the specified communication port ('COMx' or'/dev/ttyx' following the operating system) to one of ACS-310 port.

Thanks to the Mux mode, you can also establish a communication between two serialdevices through an asynchronous link. You can, for example, use a terminal on your ACSto manage a PLC located on a remote ACS.

II.2 - ACS-320

ACS-310 supports the same functions as ACS-31 but provides 4 or 8 asynchronous ports.

II.3 - ACS-4200

ACS-4100 supports the same functions as ACS-310 but provides 4, 8, 12 or 16asynchronous ports. ACS-4100 also uses the ACS-4 architecture.

Figure 1 - Using of ACS to connect serial equipments.

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III.InstallationThis chapter details the first steps to installing your ACS-31, ACS-310, ACS-4100

III.1 - Indicating LEDS of ACS-31

The top face of ACS-31 is composed by a line of five LEDS

Designation Colour State Meaning

Setup - Locate RedOn Setup mode activatedOff Normal mode

Blinking Locate function activated

Link RedOn No presence of the networkOff Presence of the network

TxD Green Data transmission To the networkRxD Green Data reception from the network

Power GreenOn ACS is onOff ACS is off


The front panel of ACS-310 composed by a line of five LEDS


Setup RedOn Setup mode activatedOff Normal mode


LAN Link RedOn No presence of the networkOff Presence of the network

LAN Tx Green Data transmission from the networkLAN Rx Green Data reception from the network

Power GreenOn ACS is onOff ACS is off

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The front panel of ACS-4100 is composed by a line of seven LEDS.


Setup RedOn Setup mode activatedOff Normal mode


Sync - Fanfault Orange

On One synchrone interface actived atleast

Off No synchrone interface activatedBlinking Fan fault

Isdn-Fan fault GreenOn One isdn interface activated at leastOff No isdn interface activated

Blinking Fan fault

Link RedOn No presence of the networkOff Presence of the network

Tx Orange Data transmission from the networkRx Green Data reception from the network

III.4 - Ports and interfaces of ACS-31

The rear face of ACS-31 displays the followings elements :

- 1 power supply connector.- 1 Ethernet port 10baseT.The front face of ACS-31 displays the following elements :- 2 asynchronous ports RS232C/V24 noted ''Serial 1The port n°1 is the console port in setup mode



- 1 power supply connector.- 1 Ethernet port 10baseT.- 4 or 8 asynchronous ports (RS232C/V24 or RS422/485A)

The port n°1 is the console port in setup mode

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- 1 power supply connector.- 1 Ethernet port 10baseT.- 1 on/off button

The front face of ACS-4100 displays the following elements :

- 4, 8, 12 or 16 asynchronous ports (RS232C/V24 or RS422/485A)- 1 asynchronous port noted ''Serial 1/Console''.- 1 port ''Serial 2''

III.7 - Cautions

OPENING THE UNIT INVALIDATES THE WARRANTY.

III.7.1 - Cleaning ACS

- Remove the power supply cable from the rear panel- Please use watertown.Caution : do not use chemical products which can damage the box paint (Alcohol,trichlo,.. )- Please be sure the box is completely dry before powering on.

III.7.2 - Note

III.7.2.1 - About ACS-31

Security of this equipment is guaranteed only if you use the included power supply or anequivalent model.Cables must only be plug at very low security voltages (VLSV).

WarningThis is a class A product. In a domestic environment this product may cause radiointerference in which case the user may be required to take adequate measures.

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III.7.2.2 - General note

The hardware and software described in this document may change without warning.The information in this document may change without warning. ACS reserves itself theright to revise this publication without having to provide notification for such revisions.Aslong as reasonable precautions have been taken, ACS assumes no responsibility forerrors that may appear in this document.

No part of this publication may be copied or reproduced in any form or by means withoutprior written consent of ACS.Windows and Microsoft Windows are trademarks of Microsoft Corporation. Ethernet is atrademark of the Xerox corporation. Netscape is a trademark of NetscapeCommunications Corporation.All other brand and product names and trademarks mentioned herein are trademarks oftheir respective owners.

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IV.Configuration

IV.1 - Introduction

The three ways to configure your ACS are :

- With an asynchronous terminal (or a terminal emulator) connected to one of its serialports.- From another network host using Telnet protocol.- From a web browser (Netscape, Internet Explorer,...).

Before using Telnet or HTTP protocols, you just need to fix ACS IP address. This can bedone with ACS administrator or with a terminal.

IV.2 - Entering IP address

IV.2.1 - Entering IP address from ACS administrator

ACS administrator enables you to locate and setup all ACSs on your LAN.To search for all ACSs on your LAN, click on "Adminstration" then on "Explorer". A windowlike this one must appears on your screen :

To change ACS's IP address, click on "IP address" cell and type the new IP adress.

IV.2.2 - Entering IP address from a terminal

Use a terminal ( 9600 bauds, 8 bits, no parity ) connected on the ACS's Console port.The Setup mode can be selected after ACS startup. When the Setup LED blinks, presson '@' three times:

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The terminal screen should display the following message :

ROOT>>

Now, you have access to a classic line shell (with a vt100, vt220, ansi terminal). Data inputerrors may be corrected by using 'left arrow ', 'right arrow' and 'backspace’ keys. The 'uparrow' and 'down arrow' keys re-edit the last command.You can now enter IP address and the network where your ACS is connected, with thefollowing commands :

IFCONFIG IP <interface> <IP_address>ROUTE ADD NET <interface> <destination> <gateway> <netmask>

Example :

ROOT>> ifconfig ip eth0 192.168.1.11Ok!ROOT>> route add net eth0 192.168.1.0 0.0.0.0 255.255.255.0Ok!

To save your configuration parameters, it is necessary to write it in permanent memory(FLASH-EPROM). Enter the save command to do achieve this :

ROOT>> saveStatus: Done.

ROOT>>

IV.3 - HTTP Configuration (Netscape, Internet Explorer)

ACS can be configured in text mode (Console, Telnet) or in graphic mode (HTTP).The following pages of this manual excusively deal with a text mode configuration.However, all text mode commands have their equivalents in graphic mode.To set up parameters in graphic mode, you just need a web browser (Netscape, InternetExplorer), and to enter ACS's IP address in URL field :

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Click on GO, and open a session under the name root. Default password is root.

Now you can configure your ACS.

IV.4 - Network interface

IV.4.1 - Identification

To correctly initialize the network connection, use the ifconfig command to enter thefollowing parameters :

- IP address. The location of your ACS on the network. This address consists in four

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numbers separated by dots (.), valid values for each of the four numbers are wholenumbers between 1 and 254, for example "192.168.2.3".- Network mask (netmask). It is a number similar to IP address, which determines whataddress is specified by the network and what place on this network is specified by yourACS. For an IP address "192.168.2.3", if you enter 255.255.255.0" as a mask value,this means that your network address is "192.168.2.0".- The maximum transfer unit system (MTU). On an Ethernet system the MTU value iscommonly established at 1500.- Broadcast address. By default, this address is the one of the system with 255 in placeof the machine address. For a network address "192.168.2.0", broadcast address willbe "192.168.2.255".

By default, network mask is configured at "255.255.255.0" (class C) and the MTU at 1500(Ethernet). Only in some particular cases, you have to change these values.

IV.4.2 - Route checking with PING command

In order to check if ACS is can be reached inside the network, you can run the pingcommand :

ROOT>> ping 192.168.1.20 machine IP address on thenetworkPING 192.168.1.20 (192.168.1.20): 56 data bytes64 bytes from 192.168.1.20: icmp_seq=0 ttl=255 time=0.6 ms64 bytes from 192.168.1.20: icmp_seq=1 ttl=255 time=38.2 ms64 bytes from 192.168.1.20: icmp_seq=2 ttl=255 time=2.7 ms64 bytes from 192.168.1.20: icmp_seq=3 ttl=255 time=2.7 ms64 bytes from 192.168.1.20: icmp_seq=4 ttl=255 time=2.8 ms

--- 192.168.1.20 ping statistics ---5 packets transmitted, 5 packets received, 0% packet lossround-trip min/avg/max = 0.6/9.4/38.2 ms

ROOT>

IV.4.3 - Routing table

Before sending an IP frame, ACS consults its routing table in order to find an entryindicating the route to use.In the following example, terminals connect to server thanks to ACS.Note that the server is to be found on the sub-network 192.168.1.0 at the address192.168.1.2 and that ACS belongs to the sub-network 192.168.2.0 at the address192.168.2.2. A bridge helps to the interconnection of the two sub-networks :

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Figure 2 - Network example to make a routing table

To send IP frames to a server, you must inform the ACS that these frames run through the192.168.2.1 router.There are three manners for this :The first consists in informing ACS that all IP frames intended for the 192.168.1.2 serverhave to be sent to the 192.168.2.1 router :

ROOT>> route add host eth0 192.168.1.2 192.168.2.1 255.255.255.255Ok!ROOT>> route staticKernel routing tableDestination Gateway Genmask Typ Iface192.168.1.2 192.168.2.1 255.255.255.255 host eth0

The second consists in informing ACS that all IP frames intended for the 192.168.1.0network have to be transmitted to the 192.168.2.1 router :

ROOT>> route add net eth0 192.168.1.0 192.168.2.1 255.255.255.0Ok!ROOT>> route staticKernel routing tableDestination Gateway Genmask Typ Iface192.168.2.0 0.0.0.0 255.255.255.0 net eth0192.168.1.0 192.168.2.1 255.255.255.255 net eth0

The third, (and most often used manner) consists in informing ACS that, if the routingtable does not contain any entry corresponding to the IP frame to send, then this one willbe sent (by default) to the 192.168.2.1 router :

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ROOT>> route add net eth0 0.0.0.0 192.168.2.1 0.0.0.0Ok!ROOT>> route staticKernel routing tableDestination Gateway Genmask Typ Iface192.168.2.0 0.0.0.0 255.255.255.0 net eth00.0.0.0 192.168.2.1 0.0.0.0 net eth0

IV.5 - Asynchronous interfaces

IV.5.1 - Software settings

Configuration of a serial port can be done with serial command :You must enter each parameter individually:

ROOT>> serial speed 9600 4ROOT>> serial csize 8 4ROOT>> serial parity none 4ROOT>> serial stopb 1 4

Port 4 can then be setup to 9600 bauds, without parity control, with a 8 bits data width andone stop bit.To set the port speed of ports 3, 6 and 7 to 19200 bps, type the following command :

ROOT>> serial speed 19200 3 6 7

To set all ports to 38400 bps, enter the following command :

ROOT>> serial speed 38400 all

To set all ports but ports 3 and 5 to 4800 bps, enter :

ROOT>> serial speed 4800 all 3 5

You can see, at any time, all current ports parameters with the following command :

ROOT>> serial show all

IV.5.2 - Asynchronous port mode

Each asynchronous port can work in one of the following modes (regardless of the otherports configurations) :

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Terminal mode Connection of an asynchronous terminal(Telnet).

Printer mode Connection of a printer (LPD).

Raw mode Connection of a passive equipment(RemoteCOM or rawTTY).

PPP modeConnection of a remote host to a network or

remote networks interconnection.(asynchronous PPP).

Rtelnet modeAccess through a TCP/IP network to anequipment or to an operating system not

equiped with the TCP/IP protocol.

For example, to program the first five ACS ports in each of these modes, commandswould respectively be :

ROOT >> serial mode term 1Ok!ROOT >> serial mode printer 2Ok!ROOT >> serial mode raw 3Ok!ROOT >> serial mode ppp 4Ok!ROOT >> serial mode rtelnet 5Ok!

IV.5.3 - Type of control

A port can be configured in local control or in modem control. In modem control, ACS willignore state of the DCD signal for this port. On the other hand, in modem control, ACS willpropose to open a session only if the DCD is active. Moreover, if the DCD signal becomesinactive, ACS will close all the open sessions on this port.To configurate port 3 in local control, enter:

ROOT>> serial linectrl local 3

To use a modem on port 2, you have to setup the port with this command :

ROOT>> serial linectrl modem 2

IV.5.4 - Flow control

Flow control can have four different values :

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Soft control XON/XOFF. Sending of XON(11H) and XOFF(13H)characters.

Hard control RTS/CTS. Signal shift.

Soft and hard controlXON/XOFF and RTS/CTS. This kind of flow control isused when one want to connect a serial printer on aport.

No control No flow control will be performed.

For example, to set up the first four ports of ACS in each of these flow control modes, youhave to enter the following commands :

ROOT>> serial flowctrl soft 1Ok!ROOT>> serial flowctrl hard 2Ok!ROOT>> serial flowctrl softhard 3Ok!ROOT>> serial flowctrl none 4Ok!

IV.5.5 - Automatic disconnection of a Modem

If there is no data traffic during a determined delay on port where the modem isconnected, ACS can decide to disconnect the modem (the DTR signal deasserted).For example, to disconnect the modem installed on port 3 if this one is not used during 2minutes, use the following command :

ROOT>> serial timeout 120 3

To disable this option, please set a delay of 0 second.

WARNING !! This automatic disconnection is sometimes managed directly by the modem.

IV.5.6 - Association of a modem form to a port

To use a modem on a port, you have to associate a modem form to this port. A modemform contains configuration parameters for the modem (see IV-8 Management of amodem connection).To associate a modem form named "gen33600" to port 1, enter :

ROOT>> serial modem gen33600 1

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IV.5.7 - AutoUser mode

AutoUser mode enables ACS to launch a session automaticallyon the specified port for acertain user. To configure ACS's port 1 in AutoUser mode for a user named "Paul", enter :

ROOT>> serial autouser paul 1

CAUTION !! You must definitely not define any password for the session lauching to beautomatical. (see IV.7 - Creation of a user.).

To come back to usual mode on port 1, enter :

ROOT>> serial autouser none 1

Consult reference manual for more details about commands that are dealt with in thischapter.

IV.6 - Saving and restoring ACS configuration

IV.6.1 - Saving in FLASH memory

All parameters are conserved by ACS in RAM, up to the next ACS boot. If you want toconserve all your parameters, you must write them in FLASH memory. Make thisoperation with the following command :

ROOT>> saveStatus: done.

ROOT>>

IV.6.2 - Saving a configuration copy

You can save a ACS configuration copy on a remote machine ; thanks to the TFTP (trivialfile transfer protocol). ACS parameters will be sent via TFTP to a file previously created onthe remote machine.Proceed as follows :Create an empty file on your TFTP server, example with the following UNIX command :

echo -n > /tmp/ACS.confchmod 666 /tmp/ACS.conf

Indicate to ACS the IP address of the server where the file will be saved, as well as thename of this file and start the transfer :

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ROOT>> system config server 192.168.1.1ROOT>> system config path "/tmp/ACS.conf"ROOT>> system config store

To restore the configuration file, execute the next command :

ROOT>> system config load

CAUTION !! The loaded configuration is stored in RAM. Save it in FLASH memory withthe save command :

ROOT>> saveStatus: Done.

ROOT>>

IV.7 - Audit

Audits generate some usefull information to control ACS's activity or to analyseconfiguration errors. This information is displayed in real time or redirected to a file. Auditcommands enable you to set type and level of captured information, as well as thedisplaying mode of information.

IV.7.1 - Audit on a remote machine

To create an audit on a remote machine, use the audit add command with followingparameters :

AUDIT ADD <syslog | trap> <remote IP> <level> <type>

- Syslog / Trap : if you use syslog option , information will be sent to syslogd daemonof the specified remote machine. If your machine does not run syslogd daemon, youmust install one. If you use an SMTP administration soft, you can display ACS's auditthanks to the trap option.

- Remote IP : It is the IP address of the remote machine on which you will displayACS's audit.

- Level : It is preciseness level of audit messages. These differents levels are

warning Minimum (displaying of errorsmessages).

notice Like warning level but there is messagesabout ACS's activity.

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warning Minimum (displaying of errorsmessages).

info Like notice level with more detailledmessages about running process.

debug All existing messages with maximumdetails.

- Type : It defines type of messages that you want to see in audit. These differentstypes are

system Messages about systemparameters (DHCP, RADIUS,save, ...).

async Messages about asynchronousports.

net Messages about networkall All preceeding types.

IV.7.2 - Audit on your console

To create on audit on your console, use the audit add console command in this way :

AUDIT ADD console <level> <type>

Audit will display in your current session's window. You will still be able to entercommands with this shell.Level and type parameters do not change.

IV.7.3 - Audit in a file

To send auditin a file, use the audit add buffer command in this way :

AUDIT ADD buffer <level> <type>

Level and type parameters do not change.

You will be able to show this file thanks to audit view and audit last commands. Theaudit view command enables you to show the entire audit file.

ROOT>> audit view

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With the audit last command, you can display the last lines of the audit file :

ROOT>> audit last 10

In this example, you will show the ten last lines of the audit file.

IV.7.4 - List of created audits

The audit show command enables you to display the list of declared audits. Example :

ROOT>> audit showbuffer 0.0.0.0debug : asyncwarning :net system

console 0.0.0.0warning : all

IV.7.5 - Delete audit

To delete an audit, use one of the following commands :

AUDIT DELETE <syslog | trap> <remote IP> <level> <type>AUDIT DELETE <buffer | console> <level> <type>

IV.7.6 - Start/stop audit

When you create an audit with the audit add command, it is immediatly actived. But youmust restart a console audit after any reboot of your ACS. This can be made thanks to theaudit start command :

ROOT>> audit startOk!

To stop a console audit, use the audit stop command :

ROOT>> audit stopOk!

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V.Rawtty and RemoteCOM

V.1 - Introduction

Rawtty and RemoteCOM enable a server to use an ACS asynchronous port as one of itsown ports. To perform this operation, you just have to install a driver on server and tosetup a few parameters on your ACS.

V.2 - RemoteCOM

RemoteCOM is a driver for Windows systems which enables you to redirect COM ports onACS. RemoteCOM is made to manage flow control signals (DTR, DSR and DCD).

V.2.1 - RemoteCOM under Windows 95/98

V.2.1.1 - Setting up the ACS-31- 310 - 4100

Only flow control parameter can be set on the ACS.Configuration example with Telnet console :

First, display current ports configuration :

ROOT>> serial show allPort Mode Speed FlowCtrl LineC Cs Par. Stop ModemName RtelnetTime01 raw 9600 soft local 8 none 1 2001 02 raw 9600 soft local 8 none 1 2002 0

If you want to set hard flow control on ports 1 and 2, enter :

ROOT>> serial flowctrl hard 1 2

Then, reset ports with new parameters :

ROOT>> reset port 1 2

Display ports configuration again to see if new parameters are set :

ROOT>> serial show allPort Mode Speed FlowCtrl LineC Cs Par. Stop ModemName RtelnetTime0

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1 raw 9600 hard local 8 none 1 2001 02 raw 9600 hard local 8 none 1 2002 0

Speed, parity, csize and stop bit are send by RemoteCOM to the ACS.RemoteCOM transmits DTR signal and recepts states of DCD and DSR signals.

V.2.1.2 - Installation of RemoteCOM driver

1 - To install RemoteCom driver, open Windows's control panel.

- Click on "Add new hardware"- Answer "No" to Windows's automatic detection.- Click on "Others".- Then click on "Have disk" and find the way to the path in which you have make a copyof RemoteCOM driver (remcom.inf).- Restart Windows after the installation of the first RemoteCOM port.

2 - Choosing COM port number.

When your system is restarted :

- In the control panel, click on "system" and device control tab.- Click on "RemoteCOM(tm)" in the menu "Ports(COM&LPT)" and choose the COMport's number associated to the RemoteCOM port.- Click on "Refresh", the "RemoteCOM(tm)" label will changes in "COMx".

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3 - RemoteCOM configuration.

- In the device control tab, click on "RemoteCOM(COMx)" in the menu"Ports(COM&LPT)".- Click on "properties", then change ACS's IP address and ACS's port number.- Example : ACS 192.168.4.23, port 7.

4 - Using RemoteCom.

You can audit RemoteCOM activity using the RemoteCOM application (icon in the taskbar).

- Click on RemoteCOM icon.- Click on "Status".- Displaying of connections and associated COM ports.- Displaying of connections/disconnections and errors (log file).- Displaying of transmitted/received datas in real time.- Displaying of active datas.

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5 - Installating another RemoteCOM port

- Control panel.- Add new hardware. - Ask "No" to Windows's automatic detection.- Click on "Ports(COM & LPT)".- Choose DECISION EUROPE ->;RemoteCOM(tm).- Restart your system.- Return to step 2 Choosing COM port number.

6 - Troubleshooting.

- Check if ACS is visible on the network. (using ping or telnet).- Check configuration and state of ACS's port.- Read the log file.

V.2.2 - RemoteCOM under Windows NT system

V.2.2.1 - Setting up the ACS-31- 310 - 4100

Only flow control parameter must be set on the ACS.Configuration example with Telnet console :

First, display current ports configuration :

ROOT>> serial show allPort Mode Speed FlowCtrl LineC Cs Par. Stop ModemName RtelnetTime01 raw 9600 soft local 8 none 1 2001 02 raw 9600 soft local 8 none 1 2002 0

If you want to set hard flow control on ports 1 and 2, enter :

ROOT>> serial flowctrl hard 1 2

Then, reset ports with new parameters :

ROOT>> reset port 1 2

Display ports configuration again to see if new parameters are set :

ROOT>> serial show allPort Mode Speed FlowCtrl LineC Cs Par. Stop ModemName RtelnetTime01 raw 9600 hard local 8 none 1 2001 0

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2 raw 9600 hard local 8 none 1 2002 0

Speed, parity, csize and stop bit are sent by RemoteCOM to the ACS.RemoteCOM transmits DTR signal and recepts states of DCD and DSR signals.

V.2.2.2 - Installation of RemoteCOM driver

RemoteCOM for WINNT is composed of :

- A service module: RemoteCOM(service).- A driver : RemoteCOM(driver).- A program for setup, audit and control of RemoteCOM service.

WARNING : Do not mistake RemoteCOM service and RemoteCOM driver (that is also aservice). This one is automatically started and stopped by RemoteCOM service.

To install RemoteCOM, click on the "Setup" file of the installation disk/path.

- Restart your system.- In the "Start" menu, click on :- Programs ->; RemoteCOM ->; RemoteCOM Administration.- Click on "Edit" in the main menu.- Create : select "Create".- Enter ACS's IP address (ex : 192.168.4.23) , ACS's port number (ex : 7), WINDOWSdevice (ex : COM3) and connection's parameters.- Change : select "View&Modify".- Delete : select "Delete".

Opening timeout : Default parameter is 10 seconds (rarely modified).

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WARNING : You must add some timeouts created by the network. Results of theconnection try can come after the open timeout delay.

Keepalive : Enables you to detect any error on the network link.0 means that KEEPALIVE is stopped. A too small value usually overloads the network (15seconds is a "good" value).

Keep the connection : The network connection will be established at the start of theRemoteCOM service. The port will not be used by another station.

Restart connection if error : Automatically restart connection (with a delay of 10seconds) after a disconnection performed by remote ACS. RemoteCOM will try to restartthe connection every 10 seconds.

Packet mode : Synchronise application that is use RemoteCOM with data flow. The"data transmitted"(EV_TXEMPTY in WaitCommEvent()) label is right only whentransmitted data have really been send by the remote port.The "COMSTAT.cbOutQue" field in ClearCommError() is updated in the same way.Note : With FAX CLASS 1 modem, this mode (used with a buffer size of 128 bytes) makepossible reception and transmission of FAX.

Signals/data synchronised mode : Activate this mode to transmit all signals (TX, RX,RTS,CTS,DTR,DSR,DCD) synchronised with data. You must not activate flow control touse this mode.

Buffers size : 1 to 4096 octetsDefault size is 2048 (value 0 or 2048).In some cases, application seems to have sent all data but these data are in buffers. If theapplication stops the connection before all data has been transmitted, you can reducebuffers size to fix this problem.

Overhelming of inter-character timeout : 0 to 500 milliseconds.The Network cuts data into several packets. Then, characters of a same "logical" frame(ex: reply message of a modem ) can be divided and received with a higher delay thandelay of a standard COM port. If you use inter characters timeout option of windows'sCOM ports, you may have to use this option too.

WARNING : Any modification will be effective after a restart of RemoteCOM service. IfRemoteCOM service is already running, you must stop and restart it.In the main menu, click on "Service", then click on "Start" (or "Stop" and "Start").

Note : When you have just finished RemoteCOM installation, RemoteCOM service isdisabled. The first time you restart your system, RemoteCOM will warn you and then you will beable to choose the activation mode of RemoteCOM service.

You can change service activation mode service at any time with WINNT services controlpanel.

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V.2.2.3 - Displaying RemoteCOM service status

Click on Service -> parameters

- Select the COM port you want display.- Check log box if you want keep information in a file.

- Be sure that RemoteCOM is not used by any application.- Click on Service ->Stop- Click on Service ->Start to reset RemoteCOM with new parameters.

Click on Status -> View in the main menu

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V.3 - Rawtty

V.3.1 - Server configuration

Installation example for a rawTTY device driver on UNIX SCO Open Server :

#./install.sh

ACS rawTTY installationACS IP address ? ? : 192.168.1.42>;>;192.168.1.42 Ok [RET,ÆOÆ] Non [æNÆ] DEL-exit ? O

PORTS in RAW mode (ex: 1 2 7 (enter) ) ? : 5 6>;>; ( 5 6 ) Ok [RET,ÆOÆ] Non [æNÆ] DEL-exit ? O

kernel relinking is running (...)

Ok

INFO:- REBOOT your system to update- default logins are offttys names are : /dev/taguse the SCO command : enable to active the loginsex: enable tag01 tag02 tag07

V.3.2 - Setting up the ACS

On ACS, you must setup the corresponding port(s) in "raw" mode:

ROOT>> serial mode raw 5 6ROOT>> serial speed 9600 5 6ROOT>> serial parity none 5 6ROOT>> serial csize 8 5 6ROOT>> serial stopb 1 5 6ROOT>> reset port 5 6

V.3.3 - rawtty, rawclose

On a UNIX server, with rawtty and rawclose commands , you can adjust someparameters of the "Rawtty" function.WARNING !! These two commands must not be used when the Driver has been installed !

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The syntax of the rawtty command is :

rawtty [-keepalive <;delay>;] [-v1] [-d] [-u username] [-c] device ACS_IP port_num

Keepalive helps to regularly check ACS's physical presence on the network.A request is carried out every <delay>; second(s), to check if the connection is still valid. Ifthere is no answer within this time range, connection is cut down.

- "-v1" option enables to use command with ACS versions previous to the 3.2 version.- "-d" option enables to enter in debug mode.- "-u" option enables to create a device under another user account.- "-c" option enables to cancel created device, (ex: /dev/raw1), at the end of the rawttyprocess.

Two commands enable you to increase or to decrease the delay of the connectedkeepalive :The first command increase keepalive delay with one second.

kill -USR1 pid_rawtty

The second decrease keepalive delay with one second.

kill -USR2 pid_rawtty

Example for a UNIX server:

rawtty /dev/raw4 192.168.1.12 5 &

The rawclose command enables you to force to close port declared in "rawtty". Syntax:

rawclose server_IP_address port_number

Example :

rawclose 192.168.1.12 5

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VI.Mux mode

VI.1 - Introduction

Mux mode enables you to establish an asynchronous link from end to end through an IPnetwork.To make this possible, data (composed by characters and changes of signal's states) areseparated into packets. These packets are then transmitted, thanks to TCP or UDPtransfert's protocols, from one serial port to the other.

VI.2 - TCP Mux

The TCP protocol warrants retransmission of lost or mistaken data and manages packets.This mode must be used in most of the cases.To configure this connection, you must set the 'client' port in mux mode and the 'server'port in raw mode.

VI.3 - UDP Mux

To transmit the data flow that forwards the asynchronous link from one end of the networkto the other, we must change this data flow in a characters flow mixed with codes whichmatch with signal's states. Packaging of data and forwarding of an IP network cangenerate delays between characters and changes of signal states if they are in differentpackets. It means that out data flow and in data flow can have mismatchingchronogrammes. It can disrupt the good running of some serial transmission's protocolslike ones used in industrial environment.Thanks to a measured delay between in data flow and out data flow, UDP mux modeenables most of transmission's protocols to use a connection through an IP network. Toconfigure this connection, you must set both ports in mux_dg mode.

VI.4 - Example n°1: Remote management of a PLC by a technician

VI.4.1 - Description

A technician wants to manage a PLC located on a remote TCP/IP network thanks to aterminal (or a terminal emulator).

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VI.4.2 - Configuration of client's side ACS

ROOT>> serial mode mux 1Ok!ROOT>> mux ip 192.168.2.1 1Ok!ROOT>> mux port 1 1Ok!ROOT>> mux dsrredirect none 1Ok!ROOT>> mux ctsredirect none 1Ok!ROOT>> mux show 1Port Mode Sync Flush KAlive Remote( IP, port)DCD->DSR->CTS->debug------------------------------------------------------------------1 mux No Yes 0 192.168.2.1 1 none none none No

ROOT>> serial show 1Port Mode Speed FlowCtrl LineC Cs Par. Stop ModemName RtelnetTimeO------------------------------------------------------------------1 mux 9600 soft local 8 none 1 2001 0

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VI.4.3 - Configuration of server's side ACS

ROOT>> serial mode raw 1Ok!ROOT>> mux dsrredirect none 1Ok!ROOT>> mux ctsredirect none 1Ok!ROOT>> mux show 1Port Mode Sync Flush KAlive Remote( IP, port)DCD->DSR->CTS->debug------------------------------------------------------------------1 raw No Yes 0 0.0.0.0 0 none none none No

ROOT>> serial show 1Port Mode Speed FlowCtrl LineC Cs Par. Stop ModemName RtelnetTimeO------------------------------------------------------------------1 raw 9600 soft local 8 none 1 2001 0

VI.5 - Example n°2: Remote management of a PLC by more than onetechnician (solution 1)


Two technicians each have a terminal and they want to manage, one after the other, aPLC located on a remote TCP/IP network.

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VI.5.2 - Solution

You cannot establish two mux TCP connections to the same destination port at the sametime.To solve this problem, we will establish each mux TCP connection only when technician'sterminal will be powered.The technician must power off his terminal to permit the other technician to manage thePLC.When a terminal is powered, there is at least one signal activated (RTS for a terminal orDTR for a terminal emulator). You just have to link this signal to serial port's DCD entry ofACS and to configure management of DCD signal by ACS (serial linectrl modem). TCPconnection will be established only if terminal is powered. This connection will be stoppedif DCD signal is not on (terminal is off).

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Make a cable with terminal's RTS (or DTR) signal linked on serial port's DCD signal.

ROOT>> serial mode mux 1Ok!ROOT>> serial linectrl modem 1Ok!ROOT>> mux ip 192.168.2.1 1Ok!ROOT>> mux port 1 1Ok!ROOT>> mux dsrredirect none 1Ok!ROOT>> mux ctsredirect none 1Ok!ROOT>> mux show 1Port Mode Sync Flush KAlive Remote( IP, port)DCD->DSR->CTS-> debug------------------------------------------------------------------1 mux No Yes 0 192.168.2.1 1 none none none No

ROOT>> serial show 1Port Mode Speed FlowCtrl LineC Cs Par. Stop ModemName RtelnetTimeO------------------------------------------------------------------1 mux 9600 soft modem 8 none 1 2001 0


ROOT>> serial mode raw 1Ok!ROOT>> mux dsrredirect none 1Ok!ROOT>> mux ctsredirect none 1Ok!ROOT>> mux show 1Port Mode Sync Flush KAlive Remote( IP, port)DCD->DSR->CTS->debug------------------------------------------------------------------1 raw No Yes 0 0.0.0.0 0 none none none No


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VI.6.2 - Solution

The solution above require that the technician powers off his terminal to allow anothertechnician to manage the PLC. If the first technician forgets to power off his terminal, thePLC is not reachable for the second technician. Another solution is to automatically breakthe unused connection after a specified timeout.Connection will be automatically relaunched when the technician will type any characteron his keyboard.

On client's side ACS :

- Link terminal's DTR signal and DCD signal of serial port n°1(make a cable).- Activate DTR signal on port n°1 (mux defaultdtr yes 1).- Configure management of DCD signal by ACS (serial linectrl modem 1).- Configure ACS to wait a character before launching the connection (serial quick no1).- Specify the timeout delay of the unused connection (serial timeout 180 1).

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On server's side ACS :

- Be sure that the DTR signal state on the client ACS will not be changed by the DSRsignal state of the server ACS (mux dsrredirect none 1).

Two conditions must be satisfied to establish the connection :

- DCD signal on : DTR is on and is linked to the DCD of the serial port, the conditionwill ever be satisfied. But we must be sure that no change of client ACS's DTR signal'sstate occurs. It is the reason why we stop the redirection of the DSR signal (muxdsrredirect none 1).- Receive a character : thanks to the serial quick no command, ACS will wait for acharacter on its serial port before establishing the connection.


ROOT>> serial mode mux 1Ok!ROOT>> serial linectrl modem 1Ok!ROOT>> serial timeout 180 1Ok!ROOT>> serial quick no 1Ok!ROOT>> mux defaultdtr yes 1Ok!ROOT>> mux ip 192.168.2.1 1Ok!ROOT>> mux port 1 1Ok!ROOT>> mux dsrredirect none 1Ok!ROOT>> mux ctsredirect none 1Ok!ROOT>> mux show 1Port Mode Sync Flush KAlive Remote( IP, port) DCD-> DSR-> CTS->debug

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------------------------------------------------------------------1 mux No Yes 0 192.168.2.1 1 none none none No


VI.6.4 - Configuration of server side's ACS

ROOT>> serial mode raw 1Ok!ROOT>> mux dsrredirect none 1Ok!ROOT>> mux ctsredirect none 1Ok!ROOT>> mux show 1Port Mode Sync Flush KAlive Remote( IP, port) DCD->DSR->CTS->debug------------------------------------------------------------------1 raw No Yes 0 0.0.0.0 0 none none none No



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VI.7.2 - Solution

The solution above assign the PLC to a technician for a minimum of 3 minutes, even if histerminal is off.This solution has two main advantages. Access to the PLC will be assigned to the firsttechnician who will try to establish the connection. If the technician power off his terminal,the PLC will be immediatly accessible to the second technician.On the other hand, if the technician forgets to power off his terminal, the PLC will beaccessible to the second technician after 3 minutes.

On client's side ACS :

- Link the DTR (or RTS) signal of the terminal to the DSR signal of serial port n°1 (makea cable).- Enable redirection of the DSR signal to the DTR signal of server ACS (muxdsrredirect dtr 1).- Link the DTR signal and the DCD signal of serial port n°1 (make a cable).- Activate the DTR signal of serial port n°1 (mux defaultdtr yes 1).- Configure management of the DCD signal by the ACS (serial linectrl modem 1).- Configure the ACS to wait a character before launching the connection (serial quickno 1).- Specify the timeout delay of the unused connection (serial timeout 180 1).

On server's side ACS :

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- Link the DTR signal and the DSR signal of serial port n°1 (make a cable).- Activate the DTR signal of serial port n°1 (mux defaultdtr yes 1). - Enable redirection of the DSR signal to the DTR signal of the client ACS (muxdsrredirect dtr 1).

DSR signals of client and server's ACS must be activated at startup. If the DSR signal onclient's side ACS is not activated at startup, ACS can't establish the initial connection.Moreover, an undetermined DSR signal on the server's side ACS can force client ACS tobreak the initial connection before this connection can be established.

State of the DTR (or RTS) signal on the terminal will be applied to the DCD on client ACS.This ACS will be able to establish or break the connection matching with terminal state (onor off).Others parameters (serial quick yes and serial timeout 180) allow to start theconnection only if the ACS is receive a character.


ROOT>> serial mode mux 1Ok!ROOT>> serial linectrl modem 1Ok!ROOT>> serial timeout 180 1Ok!ROOT>> mux defaultdtr yes 1Ok!ROOT>> mux ip 192.168.2.1 1Ok!ROOT>> mux port 1 1Ok!ROOT>> mux ctsredirect none 1Ok!ROOT>> mux show 1Port Mode Sync Flush KAlive Remote( IP, port)DCD->DSR->CTS-> debug------------------------------------------------------------------

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1 mux No Yes 0 192.168.2.1 1 none dtr none No



ROOT>> serial mode raw 1Ok!ROOT>> mux ctsredirect none 1Ok!ROOT>> mux defaultdtr yes 1Ok!ROOT>> mux show 1Port Mode Sync Flush KAlive Remote( IP, port)DCD->DSR->CTS->debug------------------------------------------------------------------1 raw No Yes 0 0.0.0.0 0 none dtr none No


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VII.Advanced functions

VII.1 - DHCP

VII.1.1 - Definition

DHCP is a client-server protocol that is aimed at a dynamical attribution of the IPaddresses to the machines on a network.At the starting point, each network machine sends a request to the DHCP server and isgiven an IP address. ACS integrates a DHCP client that enables it to get an IP addressfrom a DHCP server.A problem occurs at the networks interconnection: the DHCP requests are frames that donot go through the routers. Consequently, for two connected networks to use the sameDHCP server, the router must play the part of a DHCP relay; that is to say that it must pickthe DHCP requests up and transmit them back to the DHCP server.

ACS from the network 192.168.2.0 will transmit the DHCP requests from the twomachines back to the DHCP server (192.168.1.1). Both interconnected networks can thususe the same DHCP server.

VII.1.2 - DHCP client

ACS holds a DHCP client function. If a DHCP server is active on your network, ACS canreceive its IP address and many other parameters from the DHCP server. In factoryconfiguration, ACS boots with the DHCP mode active. The system dhcp client modecommand enables you to select the running mode of DHCP client.

SYSTEM DHCP MODE <dhcp | bootp | none>

The bootp mode enables ACS to act as a BOOTP client (Bootstrap Protocol). Thisprotocol, which is the predecessor of DHCP protocol, supports less options than DHCP.To deactivate ACS's DHCP client, use the none option.

ACS does not know the DHCP server IP address. It broadcast is request on the LAN tojoin the DHCP server. If you want to specify a particular DHCP server IP address, just usethe system dhcp server command.Example :

ROOT>> system dhcp server 192.168.10.1

If you want to go back to the broadcast method, enter the following command :

ROOT>> system dhcp server 255.255.255.255

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When ACS is booting (if the DHCP client is active), it sends its DHCP request on the LANand waits for a reply. If it does not receive a reply after 30 seconds, ACS assumes that therequest fails. Then, ACS uses IP address and other parameters saved in flash memory.To modify the reply timeout, use the dhcp clent timeout command.

Example :

ROOT>> system dhcp timeout 60

WARNING !! To validate DHCP commands, you must save new parameters in flashmemory. The next time ACS will boot, it will use these new parameters.

VII.1.3 - DHCP relay

ACS holds the function of DHCP relay. To activate this function, you just have to use thesystem dhcp relay command. This syntax command is the following :

DHCP RELAY <server1/server2> <IP adress>If the IP address of your DHCP server is 192.168.1.1, the following command will activateACS's DHCP relay :

ROOT>>dhcp relay server 1 192.168.1.1

Note that you can enter IP address of a second DHCP server. In this case, ACS willretransmit DHCP requests to both servers and will take care of the first reply that it willreceive.

To launch the DHCP relay, enter :

ROOT>>dhcp relay enable yes

To stop the DHCP relay, enter:

ROOT>>dhcp relay enable no

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VIII.Technical specifications

ACS-31 ACS-310 ACS-4100LAN ETHERNET10 base T Yes (1) Yes Yes10 base FLMultimode

Yes (1)

ASYNCHRONOUSNumbers of ports 2 4.8 4,8,12,16RS232C Interface Yes (1) Yes (1) Yes (1)RS422/485AInterface

Yes (1) Yes (1) Yes (1)

Overvoltage 15kV ESDSignals XON / XOFF, RTS / CTS, DTR, DSR, DCDSpeed 440 kbdCabling RJ45 (Option DB25M/DB9)SECURITYEmbedded Firewall Yes Yes YesTime range Yes Yes YesHTTPS SSLV2-V3 Yes (3) Yes (3) YesSecured RemoteCOM

SSL V3 - DES 40 ou 56 bits, RC4 40 ou 128 bits, RSA 512 ou1024 bits

ADMINISTRATIONHTTP Yes Yes YesSNMP MIBII, MIBACS

Yes (2) Yes (2) Yes

Java Yes Yes YesDHCP client, relay Yes (2) Yes (2) YesTelnet Console Yes Yes YesSerial ports ( I / O ) Yes Yes YesMISCELLEANEOUSProtocols IP, TCP, UDP, ICMP, ARP, Finger, TFTP, Telnet, RTelnet, DHCP,

BOOTP, HTTP, SNMP, SyslogRemoteCOM 2 4.8 4,8,12,16Mux mode Yes Yes Yes

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GENERALMemory 8 Mo 16 MoTimer WatchDog Yes Yes YesCPU 32 bits - 40 Mhz 32 bits- 133 MhzSize 69*135*27 mm 220*166*31 mm 446*187*44 mmPower supply Externe, 100V à 240V - 47 à 63 Hz

-13 maxInterne, 85V à 265V - 47 à

68 Hz30W max

Certifications EN55022B, CISPR22, EN60950, EN41003, CISPR24

(1) : Or(2): Basical version available(3) : Basical version available without HTTPS

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IX.Cabling

IX.1 - RJ45 connector

PIN Circuit1 CTS2 TxD3 Ground4 RxD5 DCD6 DTR7 RTS8 DSR

Figure 8 - RJ45 Front view

IX.2 - ACS (DTE) to DTE equipment

With RTS/CTS flow control

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IX.3 - ACS (DTE) to asynchronous terminal (DTE)

With DTR/DSR flow control

IX.4 - ACS (DTE) to DCE equipment - RS232C (Modem)

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RJ45-DB25 Male - Comx 232 Update B8/19/98

RJ45 - DB9 Male - Comx 232 Update B8/19/98

IX.5 - ACS (DTE) to DCE equipment - RS422A

RJ45 - DB25 Male - Comx 422 Update C28/0699

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RJ45 - DB9 Male - Comx 422 Update C6/28/99

IX.6 - ACS (DTE) to DCE equipment - RS485

RJ45 - DB9 Male - Comx 485 Update A7/2/99

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